I agree! I had a black Joye 510 kit, and the stainless steel tip made the rest of my e-cig look like a cheap toy. I ordered steel batteries and atomizers to match the tips, and now it looks very classy!
By the way, about the rust, do you often have juice on the top part of the funnel, when you look into the tip? I was just thinking that if there's liquid there after you vape (sometimes I find there's juice there, even though I take off the tip to drip - moisture builds on the bottom of the tip from vaping a lot, then if I suck hard I must draw some of that liquid up the tip towards my mouth) then that might be the cause of the rust.
After reading your initial post, I have a habit of wiping my tip throughout the day, thinking I might get rust eventually